Duke Energy issued a press release on Tuesday morning asking customers to conserve power over the next 24 hours.
On Monday, a Duke Energy spokesperson said the company was not anticipating widespread outages, but that any extreme weather can be taxing on equipment.
In Tuesday's release, Duke recommended customers turn off unnecessary lights, keep the thermostat at the "lowest comfortable setting" and put ceiling fans on reverse to help keep rooms warm.
If the power does go out, customers were told to call 1-800-769-3766 for Duke Energy Carolinas or 1-800-419-6356 for Duke Energy Progress or report the outage on line at www.duke-energy.com/storms.
At 10 a.m., Duke Energy's website showed 153 homes reporting outages in York County, most in the south-central part of the county.
At that time, the National Weather Service reported the temperature in York County as 12 degrees with a wind chill of 4 degrees. The temperature was not expected to get higher than 28 degrees all day.